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Design of Broad Band I. F. Amplifier. Part II

 

作者: Richard F. Baum,  

 

期刊: Journal of Applied Physics  (AIP Available online 1946)
卷期: Volume 17, issue 9  

页码: 721-730

 

ISSN:0021-8979

 

年代: 1946

 

DOI:10.1063/1.1707776

 

出版商: AIP

 

数据来源: AIP

 

摘要:

This paper is a continuation of a previous article on the design of broad band I.F. amplifiers of the stagger‐tuned type. The analysis is extended to unrestricted band width. It is shown that an exact solution is possible for either an oscillatory or a monotonic response, with this result: 1. The necessary number of stages (t) for a given minimum attenuation in the cut‐off region depends again only on the gain tolerance and the desired response. 2. Attentuation minima and maxima again appear at frequencies within the band, easily located and dependent only on the number of stages. 3. The amplifier consists of a number of pairs of circuits, which have the same figure of meritQnand tune at resonant frequenciesf0ndisposed in geometric symmetry around the middle band frequencyf0thus makingf0nequal to &dgr;nf0andf0/&dgr;n, respectively. Formulas forQnand &dgr;nare derived. The circuit impedances are calculated from a prescribed gain or from the maximum obtainable gain. A formula for the maximum gain band width product is given. A comparison is made between the performance of amplifiers with monotonic and oscillatory response. A practical example is worked out.

 

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